Time-Of-Flight (TOF) MR angiography has exhibited
considerable advantages at very-high and ultra-high
magnetic fields. However, the tracking saturation pulse
to suppress venous signals in TOF is commonly omitted at
7T to stay within the SAR limit, leading to venous
contamination in MIP angiograms. This study reduces the
duty cycle of saturation pulse by introducing segmented
TOF. Comparing with the conventional TOF sequence, the
new sequence reduces the total number of saturation
pulses and the SAR values considerably. As a result, the
advantages of 3T and 7T MR angiography are better
realized to improve the angiogram quality.

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